Proceedings of PVP2005 2005 ASME Pressure Vessels and Piping Division Conference PVP2005-71581 THE EFFECT OF MANUFACTURING PROCESS ON RESIDUAL STRESSES OF PIPE BENDS

ABSTRACT Feeder pipes in CANDU® reactors are an integral part of the circulating heat transport system, connecting the in-reactor fuel channels with the primary heat transport pipes. The feeder pipes are 1.5" to 3.5" in nominal size and made out of SA-106 Grade B material. A typical CANDU 6 station has 760 feeder pipes, half of which are located at the fuel channel inlet and the other half are at the fuel channel outlet. In one of the CANDU 6 stations, 2 feeder bends were replaced due to through-wall cracks and 6 others were replaced due to partial cracks detected by non-destructive examination techniques. In all cases, cracks were axial in orientation and were either at the inside surface of the bend flanks (approximately 60° from the intrados symmetry plane) or at the outside surface of the bend extrados

The effect of processing history on a cold rolled and annealed Mo-Nb microalloyed TRIP steel

In this paper, a Mo-Nb microalloyed TRIP Steel was subjected to several heat treatments designed to generate different microstructures. These microstructures were then cold rolled and TRIP-annealed, and the resulting tensile properties and retained austenite characteristics were determined. The results reveal that prior heat treatment has a significant effect on the cold rolled and annealed behavior. Generally, an increasing volume fraction of proeutectoid ferrite prior to cold rolling and TRIP annealing leads to improved tensile ductility. This is due to increased work-hardening rates, which, in turn, correlate to increased carbon enrichment in the retained austenite. These results can clearly be used to optimize the hot rolling process to produce hot strip for the subsequent production of cold rolled Mo-Nb TRIP Steel. (author abst.)Peer reviewed: YesNRC publication: Ye

T2 and O2 Li\u2082/\u2083[Co\u2093Ni\u2081/\u2083\u208b\u2093/\u2082Mn\u2082/\u2083\u208b\u2093/\u2082]O\u2082 electrode materials

Peer reviewed: YesNRC publication: Ye

Titanium-based composites produced by powder metallurgy

Titanium-based metal-matrix composites, reinforced with ceramic particulates, have considerable potential for improvements in properties and service temperature, while retaining isotropic behaviour and ease of fabrication using conventional processing methods. However, the potential of titanium based composites can be limited by the extreme chemical reactivity of titanium with most ceramic materials which can result in the formation of a chemical reaction product at the matrix/ceramic interface. In this work, Ti-6%Al-4%V/TiC particle reinforced composites were fabricated using elevated temperature sintering and/or deformation processing.Peer reviewed: YesNRC publication: Ye

Development and application of dual phase steels for cold heading high strength steel fasteners

Peer reviewed: YesNRC publication: N

Dual phase steels for cold-heading applications

Peer reviewed: YesNRC publication: N

Development and application of dual phase steels for cold heading high strength steel fasteners

Peer reviewed: YesNRC publication: N